Banner Graphic a collage of images representing various USGS activities

Browse USGS by Category and Location

Category:	All Categories>topics>biological and physical processes>atmospheric and climatic processes>storms>tornadoes
Location:	Anywhere

Here are some USGS Web pages with more information on tornadoes and Anywhere:

Geographic distribution of major hazards in the U.S. Webpage with six maps showing areas in the contiguous 48 states (not Hawaii and Alaska) with a relatively high risk or frequency of selected hazards (floods, earthquakes, landslides, hurricanes, tornadoes, and volcanic eruptions). (Score: 0.690)

Climate of North Dakota: severe storms Reviews frequency and distribution of tornadoes, wind storms, and hail storms in North Dakota. (Score: 0.452)

How "Browse USGS" works

To broaden your category or location, use the "breadcrumbs" above. To narrow or shift your selections, use the boxes below.

Change category:

Change location:

Search for categories:

See Alphabetical Index of Categories

About tornadoes:

Definition: Rotating columns of air ranging in width from a few yards to more than a mile and whirling at destructively high speeds, usually accompanied by funnel-shaped downward extensions of a cumulonimbus cloud. [American Heritage Dic. of the English Language, 4th ed.]